ML19296A408
| ML19296A408 | |
| Person / Time | |
|---|---|
| Site: | La Crosse File:Dairyland Power Cooperative icon.png |
| Issue date: | 03/12/1979 |
| From: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | Linder F DAIRYLAND POWER COOPERATIVE |
| References | |
| NUDOCS 7903190553 | |
| Download: ML19296A408 (1) | |
Text
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&A UNITED STATES T.6 ; &j NUCLEAR REGULATORY COMMISSION e
[4. ;g, ) *j nEcionsii 799 ROOSEVELT ROAD m
GLEN E LLYN, ILLINols 60137 s
p 12 1979
' Docket No. 50-409 Dairyland Power Cooperative ATTN:
Mr. F. W. Linder General Manager 2615 East Avenue - South La Crosse, WI 54601 Gentlemen:
Enclosed is IE Bulletin No. 79-03, which requires action by you with regard to your power reactor facility with an operating license or a construction permit.
Should you have any questions regarding this Bulletin or the actions required of you, please contact this office.
Sincerely, uh
@)k m-h4ames G. Keppler /
Director
Enclosures:
1.
List of IE Bulletins Issued in Last Twelve Months cc w/encls:
Mr. R. E. Shimshak, Plant Superintendent Central Files Director, NRR/DPM Director, NRR/ DOR PDR Local PDR NSIC TIC Anthony Roisman, Esq.,
Attorney 7903190 553
U.S. NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENTOPCEMENT REGION III
~
March 12, 1979 IE Bulletin No. 79-03 LONGITUDINAL WELD DEFECTS IN ASME SA-312 '1TPE 304 STAINLESS STEEL FIPE SPOOLS MANUFACTURED BY YOUNGSTOWN WELDING AND ENGINEERING COMPANY Description of Circumstances:
On September 27, 1978, the Arizona Public Service Company reported that defects had been discovered in longitudinal welds in ASME Section III class 2 pipe supplied for the Palo Verde Nuclear Generating Station (PVNGS). On November 17, 1978, the Southern California Edison Compsny reported similar defects in pipe supplied for the San Onofre Nuclear Generating Station, Units 2 and 3.
Pullman Power Products of Los Angeles, California supplies safety-related fabricated piping spools of various diameters for the PVNGS.
The defects were discovered by Pullman in ASME SA-312 type 304 stainless steel pipe supplied to Pullman by Youngstown Welding and Engineering Company of Youngstown, Ohio. The pipe is manufactated by rolling plate into cylinders and then fusich velding the longitudinal seam without filler metal.
Pullman discovered defects in the longitudinal welds while radiographing their circumferential shop welds. Further radiographic examlaa:icn of the longitudinal welds revealed rejectable por"sity ani in:k of f;3f>a.
Pullman then performed ultrasonic examination of the full lengtn c1 :ne longitudinal welds and discovered indications exceeding the acceptance criteria of ASME Section III.
Further ultrasonic examination revealed indications in other piping subassemblies where pipe was supplied by Youngstown. Two indications verified by radiography were identified as porosity and measured 0.350 inch by 0.125 inch in one case and 0.300 inch by 0.125 inch in another case in pipe with a nominal wall thickness of 0.375 inch.
The additional examinations revealed that of 103 spools and four pipe supports shipped to PVNGS, 44 spools and one pipe support were found to contain ultrasonic indications exceeding those permitted by the ASME Code. Of 65 partially fabricated piping spools, 30 were found to be similarly defective. The acceptance criteria for the pipe supplied by Youngstown includes 100 percent ultrasonic examination of the longitudinal 00f6 M316 013 g
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